1. 添加依赖，修改pom.xml文件

	<!--数据库认证相关 start-->            
    <dependency>
        <groupId>org.apereo.cas</groupId>
        <artifactId>cas-server-support-jdbc</artifactId>
        <version>${cas.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apereo.cas</groupId>
        <artifactId>cas-server-support-jdbc-drivers</artifactId>
        <version>${cas.version}</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.27</version>
    </dependency>
    <!--数据库认证相关 end-->

2. 创建用户表

首先创建一张用户表，以便测试

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for t_user
-- ----------------------------
DROP TABLE IF EXISTS `t_user`;
CREATE TABLE `t_user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(255) NOT NULL,
  `password` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of t_user
-- ----------------------------
INSERT INTO `t_user` VALUES ('1', 'admin', '123');

3. 配置数据库连接

配置 application.properties 文件

首先注释掉默认的用户名密码

添加数据库连接

cas.authn.jdbc.query[0].url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false
cas.authn.jdbc.query[0].user=root
cas.authn.jdbc.query[0].password=root
cas.authn.jdbc.query[0].sql=select * from t_user where username=?
cas.authn.jdbc.query[0].fieldPassword=password
cas.authn.jdbc.query[0].driverClass=com.mysql.jdbc.Driver